Apparently, that was true when mod_cluster was mantained entirely on jboss.org; after it was moved to github the precompiled binaries are not available anymore, probably because things work different on github. What I find confusing is that when you google for mod_cluster, you always end on the home page at jboss.org, but the 'download' tab that is found there makes you believe that the newest version is 1.2.0.Final. It's true that the home page has a note about development being moved to github, but what that means is not clear to everybody, and the 'DOWNLOAD' tab catches your eye first anyway. I think a warning note at the top of the old download page would be more helpful (something like "mod_cluster versions from 1.2.1 on are found on github").